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Eastern North Pacific Tropical Weather Discussion (Text)



000
AXPZ20 KNHC 230907
TWDEP

Tropical Weather Discussion
NWS National Hurricane Center Miami FL
1005 UTC Thu Feb 23 2017

Tropical Weather Discussion for the eastern Pacific Ocean from
the Equator to 32N, east of 140W. The following information is
based on satellite imagery, weather observations, radar, and
meteorological analysis.

Based on 0600 UTC surface analysis and satellite imagery through
0900 UTC.

...INTERTROPICAL CONVERGENCE ZONE/MONSOON TROUGH...  

There is no ITCZ over the forecast waters north of the equator. 

...DISCUSSION...   

OFFSHORE WATERS WITHIN 250 NM OF MEXICO...

Winds and seas have fallen below advisory criteria over the Gulf
of Tehuantepec. Elsewhere, a tight pressure gradient between 
high pressure west of the Baja California peninsula and a trough 
along western Mexico continues. Overnight ASCAT pass depicts
strong to near gale winds off the coast of Baja California Norte
as a result of this tight gradient. Strong winds also prevail 
over the far northern Gulf of California. Seas off the coast of 
Baja California Norte are in the 8-11 ft range. The area of high
pressure northwest of the area will weaken by Saturday. This 
will loosen the pressure gradient over the area, and winds will 
diminish below advisory criteria. Northwest swell will continue 
to prevail off the west coast of Baja California, maintaining 
seas 8 ft or greater through Friday night. Seas are expected to 
subside below 8 ft by late Friday night. A fresh set of 
northwesterly swells will arrive offshore Baja California Norte 
by Monday.

OFFSHORE WATERS WITHIN 250 NM OF CENTRAL AMERICA, COLOMBIA, AND 
WITHIN 750 NM OF ECUADOR...

Light to gentle winds will prevail through Saturday. Winds will
freshen off the coast of Central America Saturday night through 
Sunday night as offshore gap winds develop in response to 
building high pressure over the Caribbean.

REMAINDER OF THE AREA... 

Slowly subsiding NW swell continues to propagate across the 
forecast waters. Seas greater than 8 ft cover much of the 
forecast waters north of 10N and west of 115W. Areal coverage of
seas greater than 8 ft continues to decrease. By Friday, seas 
will subside below 8 ft over most of the forecast area, except 
over the northwest waters as a cold front moves into the area
and ushers in fresh northwest swell. Combined seas associated 
with this swell will peak around 12 ft Saturday night over the
northwest waters. Strong to near gale winds are expected both 
ahead of, and behind, the front as it crosses the northern waters
this weekend. 

$$
AL


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Page last modified: Thursday, 23-Feb-2017 12:24:11 UTC